406 
ACTIXOPTERYGII. 
circular in transverse section in its distal portion; the top of the 
base gradually becoming flattened as it passes into the cranial roof. 
External ornament as in P.ferox. 
Form. Sf Log. Senonian: Kent. 
P. 5631. The type specimen, a fractured rostrum showing the bases 
of the pair of vomerine teeth ; Chalk, Kent. A diagram¬ 
matic outline of the left side-view of the fossil is shown 
of half the natural size in fig. 41, no. 2 (p. 403), and trans¬ 
verse sections are given ibid. nos. 2 a-c. Harford Coll. 
Protosphyraena minor (Agassiz). 
1837-44. Tetrapterus minor , L. Agassiz, Poiss. Foss. vol. v. pt. i. pp. 7, 
91, pi. lx. a. figs. 9, 10 (; non figs. 11-13). 
1888. Protosphyrcena minor , A. S. Woodward, Proc. Geol. Assoc, 
vol. x. p. 321. 
1890. Protosphyrcena minor , J. Felix, Zeitschr. deutsch. geol. Ges. 
vol. xlii. p. 299. 
Type. Fragment of rostrum ; British Museum. 
Kostrum comparatively delicate and much elongated, attaining a 
length of at least 0*15 ; the transverse section a depressed oval 
throughout its length, and the internal cavity extending a con¬ 
siderable distance towards the gradually tapering end ; the external 
surface ornamented with coarse, closely-arranged, parallel longitu¬ 
dinal ridges, and its upper aspect marked with a median longitudinal 
groove which does not obliterate the ornamentation. 
Ko portion of this fish except the rostrum has hitherto been 
identified. 
Form. Log. Turonian : Kent and Sussex. 
4078. Fragment of rostrum described and figured by Agassiz, 
loc. cit. ; Chalk, Lewes. The extremity of the fossil was 
missing when received by the Museum. Mantell Coll. 
49758. Larger portion of a similar rostrum, much fractured ; Grey 
Chalk, Lewes. Capron Coll. 
49100. Another crushed and broken specimen, displaying the large 
internal cavity and the superficial ornamentation; pro¬ 
bably from the Lower Chalk of Burham, Kent. 
Mrs. Smith’s Coll. 
32337. Distal end of rostrum, displaying ornament and apparently 
worn towards the extremity; Lower Chalk, Burham. 
The ridged ornament is more irregular on the inferior 
than on the superior aspect. Purchased , 1857. 
